A2osX/DRV/SSC.I.DRV.S.txt

335 lines
6.6 KiB
Plaintext
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
.LIST OFF
.OP 65C02
.OR $2000
.TF /A2OSX.BOOT/DRV/SSC.I.DRV
*--------------------------------------
.INB /A2OSX.DEV/INC/MACROS.I
.INB /A2OSX.DEV/INC/A2OSX.I
.INB /A2OSX.DEV/INC/PRODOS.I
*--------------------------------------
BUF.SIZE .EQ $20
BUF.MASK .EQ $1F
*--------------------------------------
ZPTmpPtr1 .EQ ZPDRV
*--------------------------------------
.INB DRV/X.SER.6551.S
*--------------------------------------
* File Header (16 Bytes)
*--------------------------------------
CS.START cld
jmp Dev.Detect cld,jmp abs=DRV
.DA #$61 6502,Level 1 (65c02)
.DA #1 DRV Layout Version 1
.DA 0
.DA CS.END-CS.START Code Length
.DA DEV.HEADER-CS.START Device Header Offset
.DA DRV.CS.START-CS.START Driver Code Offset
.DA DRV.CS.END-DRV.CS.START Drv Code Length
*--------------------------------------
* Relocation Table
*--------------------------------------
L.MSG.DETECT .DA MSG.DETECT
L.MSG.DETECT.OK .DA MSG.DETECT.OK
L.MSG.DETECT.KO .DA MSG.DETECT.KO
L.DEV.HEADER.NAME .DA DEV.HEADER.NAME
.DA 0 End Of Reloc Table
*--------------------------------------
Dev.Detect sta hArgs
>LDYA L.MSG.DETECT
>SYSCALL CPrintFYA
stz ZPTmpPtr1
lda #$C1
sta ZPTmpPtr1+1
.1 ldx #DEVSIG.Length-1
.2 ldy DEVSIG.Offset,x
lda (ZPTmpPtr1),y
cmp DEVSIG.Value,x
bne .3
dex
bpl .2
bra .4
.3 inc ZPTmpPtr1+1 no match, try next slot....
lda ZPTmpPtr1+1
cmp #$C8
bne .1
>LDYA L.MSG.DETECT.KO
>SYSCALL CPrintFYA
lda #MLI.ERR.NODEV Not Found in any slot, exiting
sec
rts
.4 lda ZPTmpPtr1+1
* sta DEVSLOTCn
and #$0F
sta DEVSLOT0n
ora #$30
sta DEV.HEADER.NAME+4
asl
asl
asl
asl
sta DEVSLOTn0
clc
adc #SSC.DATA+1
sta DEV.DATA.BFFF
>PUSHW L.DEV.HEADER.NAME
>LDYA L.MSG.DETECT.OK
>SYSCALL CPrintFYA
clc
rts
*--------------------------------------
CS.END
DEVSIG.Offset .HS 05070B0C
DEVSIG.Value .HS 38180131
DEVSIG.Length .EQ DEVSIG.Value-DEVSIG.Offset
MSG.DETECT >CSTR "Apple SSC (Super Serial Card,//c Serial Port) Driver (IRQ Enabled).\n"
MSG.DETECT.OK >CSTR "SSC Installed As Device : %S\n"
MSG.DETECT.KO >CSTR "No SSC Found.\n"
hArgs .BS 1
*--------------------------------------
* Device Header (16 Bytes)
*--------------------------------------
DEV.HEADER .DA DRV.CS.START
.DA #S.DEV.S.WRITE+S.DEV.S.READ+S.DEV.S.IRQ
DEV.HEADER.NAME >PSTR "COM1" NAME
*--------------------------------------
* Driver Code
*--------------------------------------
DRV.CS.START cld
jmp (.1,x)
.1 .DA STATUS
.DA BADCALL
.DA BADCALL
.DA BADCALL
.DA CONTROL
.DA BADCALL
.DA OPEN
.DA CLOSE
.DA READ
.DA WRITE
.DA IRQ
L.STAT .DA STAT
.DA 0 end or relocation
*--------------------------------------
BADCALL lda #MLI.ERR.BADCALL
sec
rts
*--------------------------------------
STATUS >LDYA L.STAT
clc
rts
*--------------------------------------
CONTROL clc
rts
*--------------------------------------
OPEN php
sei
ldx DEVSLOTn0
stz SSC.RESET,x
stz INBUF.PTR
stz INBUF.CNT
stz OUTBUF.PTR
stz OUTBUF.CNT
lda #SSC.CTL.CLKINT+SSC.CTL.B9600
sta SSC.CTL,x
lda #SSC.CMD.TEIRQ+SSC.CMD.TE+SSC.CMD.DTR
sta SSC.CMD,x
lda SSC.DATA,x discard any garbage byte
lda SSC.STATUS,x clear any IRQ pending
plp
clc
rts
*--------------------------------------
CLOSE php
sei
ldx DEVSLOTn0
stz SSC.RESET,x
plp
clc
rts
*--------------------------------------
READ php
sei
lda INBUF.CNT
beq .9
ldx INBUF.PTR
ldy INBUF,x
txa
inc
and #BUF.MASK
sta INBUF.PTR
dec INBUF.CNT
tya
plp
clc
rts
.9 plp
lda #0
sec
rts
*--------------------------------------
WRITE php
sei
tay save char in Y
* ldx DEVSLOTn0
* lda SSC.STATUS,x
* bit #SSC.STATUS.DCD+SSC.STATUS.DSR true when 0
* bne .9
ldx OUTBUF.CNT Buffer Empty?
bne .11 not empty, queue char
ldx DEVSLOTn0
lda SSC.STATUS,x
and #SSC.STATUS.TDRE Register Empty ?
beq .10 not empty, queue char
tya yes, write directly to ACIA
sta SSC.DATA,x
plp
clc
rts
.10 ldx OUTBUF.CNT
.11 cpx #BUF.SIZE
beq .9 Buffer Full!!
lda OUTBUF.PTR
clc
adc OUTBUF.CNT
and #BUF.MASK
tax
tya
sta OUTBUF,x
inc OUTBUF.CNT
* ldx DEVSLOTn0
* lda #SSC.CMD.TEIRQ+SSC.CMD.DTR
* sta SSC.CMD,x
plp
clc
rts
.9 plp
sec
rts
*--------------------------------------
* IRQ Handler
* on exit, CC if handled
*--------------------------------------
IRQ stz .8+1
.1 ldx DEVSLOTn0
lda SSC.STATUS,x
* bpl .9 IRQ from this device ? no, exit !!!!Applewin bug #308!!!!
bit #SSC.STATUS.RDRF incoming char?
beq .3
*------------ IRQ In
ldy SSC.DATA,x read data to clear IRQ
lda INBUF.CNT
cmp #BUF.SIZE
beq .8 buffer full, discard and exit
clc
adc INBUF.PTR
and #BUF.MASK
tax
tya get back data
sta INBUF,x
inc INBUF.CNT
lda #$ff
sta .8+1
bra .1
*------------ IRQ Out
.2 ldx DEVSLOTn0
lda SSC.STATUS,x
.3 bit #SSC.STATUS.TDRE
beq .8 no transmition possible....
lda OUTBUF.CNT something to transmit ?
beq .8
ldy OUTBUF.PTR
lda OUTBUF,y
sta SSC.DATA,x
dec OUTBUF.CNT
tya get back OUTBUF.PTR
inc
and #BUF.MASK
sta OUTBUF.PTR
bra .2
.8 lda #$ff did we finally handle and IRQ condtion ?
beq .9
clc
rts
.9 sec
rts
*--------------------------------------
DRV.CS.END
DEVSLOT0n .BS 1
*DEVSLOTCn .BS 1
DEV.DATA.BFFF .BS 1
DEVSLOTn0 .BS 1
INBUF.PTR .BS 1
INBUF.CNT .BS 1
OUTBUF.PTR .BS 1
OUTBUF.CNT .BS 1
INBUF .BS BUF.SIZE
OUTBUF .BS BUF.SIZE
*--------------------------------------
STAT .DA #S.DEVSTAT.S.WRITE+S.DEVSTAT.S.READ+S.DEV.S.IRQ
.DA #0,#0,#0
>PSTR "Serial Card/Port"
.DA #S.DEVSTAT.TYPE.CHAR
.DA #0
.DA $0900
*--------------------------------------
MAN
SAVE DRV/SSC.DRV.I.S
ASM